Temperature Zone for Pecan Trees

Pecan nut production relies on proper climate conditions.

The pecan tree (Carya illinoensis) is native to North America, providing a marketable source of produce for commercial purposes as well as a natural food supply for wildlife. Under the correct conditions, pecan trees can reach a mature height of about 70 feet. These shade trees thrive in areas with mild climates and long growing seasons.

Climate Zones

Pecan trees are hardy in U.S. Department of Agriculture plant hardiness zones 6 through 9. Although these trees also can survive in zone 5, they won’t produce nuts there. Locations that experience warm, lengthy growing seasons with minimal nighttime temperature drops provide the optimal climate for pecan nut production.

Temperatures

Minimal temperatures at the low end of the pecan tree’s hardiness range can reach as low as minus 20 degrees Fahrenheit. At temperatures lower than that, cold damage may occur. Temperatures averaging 80 degrees Fahrenheit during the three hottest months of the year and 45 to 55 degrees Fahrenheit during the year's three coldest months encourage optimal pecan growth and nut production.

Nut Production

Individuals in areas with temperatures too cold to produce a hearty pecan nut crop may have more success growing hican trees, a cold-tolerant tree variety that is a cross between hickory and pecan. Pecan trees that grow in areas with temperatures above the recommended climate zones tend to produce poor crops. Reduced airflow and high humidity can further decrease nut production.

Site Considerations

U.S. Department of Agriculture plant hardiness zone recommendations provide a guideline for plant growth, but certain factors can cause temperatures to fluctuate within specific zones. Low-lying areas within the landscape tend to retain cold temperatures at night, making those locations more susceptible to frost damage. Planting sites along southern sides of buildings receive reflected heat and sunlight, making them warmer than outlying areas. Pecan trees grow best in sunny areas with good air movement and deep, porous soil.

About the Author

Piper Li, a professional freelance writer, began writing in 1989. Her articles appear online at Biz Mojo, Walden University and various other websites. She is the co-editor for "Kansas Women: Focus on Health." With a bachelor's degree in journalism from Mesa State, Li enjoys writing about health, horticulture and business management.